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Discounted Lease Rentals: (Details) - USD ($)
Sep. 28, 2019
Dec. 29, 2018
Discounted Lease Rentals    
Discounted lease rentals, current $ 3,012,900 $ 3,021,900
Discounted lease rentals $ 4,400,000  
Secured Debt    
Discounted Lease Rentals    
Weighted average interest rate on a non-recourse basis (as a percent) 6.39%